Monitoring device



FIG. 1 is a front perspective view of a monitoring device;

FIG. 2 is a rear perspective view of the monitoring device;

FIG. 3 is a front view of the monitoring device;

FIG. 4 is a rear view of the monitoring device;

FIG. 5 is a left side view of the monitoring device;

FIG. 6 is a right side view of the monitoring device;

FIG. 7 is a top view of the monitoring device; and,

FIG. 8 is a bottom view of the monitoring device.

The broken lines in the drawings show portions of the monitoring device that form no part of the claimed design. 

CLAIM The ornamental design for a monitoring device, as shown and described. 